Dialyzer fixes (#5)

Reviewed-on: #5
Co-authored-by: Craig Everett <zxq9@zxq9.com>
Co-committed-by: Craig Everett <zxq9@zxq9.com>

src/hz_man.erl

@@ -77,7 +77,7 @@ chain_nodes() ->
 
 
 -spec chain_nodes(ToUse) -> ok
-    when ToUse :: [hz:chain_nodes()].
+    when ToUse :: [hz:chain_node()].
 
 chain_nodes(ToUse) ->
     gen_server:cast(?MODULE, {chain_nodes, ToUse}).
@@ -164,7 +164,7 @@ handle_cast({tls, Boolean}, State) ->
     NewState = do_tls(Boolean, State),
     {noreply, NewState};
 handle_cast({chain_nodes, []}, State) ->
-    {noreply, State#s{chain_nodes = none}};
+    {noreply, State#s{chain_nodes = {[], []}}};
 handle_cast({chain_nodes, ToUse}, State) ->
     {noreply, State#s{chain_nodes = {ToUse, []}}};
 handle_cast({timeout, Value}, State) ->
@@ -178,7 +178,7 @@ handle_info({'DOWN', Mon, process, PID, Info}, State) ->
     NewState = handle_down(PID, Mon, Info, State),
     {noreply, NewState};
 handle_info(Unexpected, State) ->
-    ok = log("Unexpected info: ~tp~n", [Unexpected]),
+    ok = log(warning, "Unexpected info: ~tp~n", [Unexpected]),
     {noreply, State}.